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The last edit to this post was made by ycyycy1000 on 2019-7-27 at 21:55. 1. Toppling: This occurs when the foundation of the tower crane is soft or uneven, or when safety devices such as load limiters or torque limiters fail, resulting in the entire tower collapsing or the crane’s boom, counterweight arm, and top cap falling to the ground. Additionally, the crane can still be used as normal even when its legs have not been fully extended, and improper operation during the installation and dismantling of the tower crane can also easily lead to tipping accidents. 2. Broken arm Accidents involving a broken arm can be caused by excessive lifting torque, failure of the boom limit mechanism leading to over-retraction, or the collapse of the crane. Furthermore, such accidents can also easily occur when there are issues with manufacturing quality, due to a lack of maintenance over time, cracks appearing in the arm sections, overload, or vibrations caused by emergency braking. 3. Hook detachment or breakage: Refers to accidents in which heavy objects disappear as a result of them coming loose from the hook opening using heavy lifting equipment or specialized lifting tools. The load may fall off if the hook lacks an anti-drop device, if the hook mouth is deformed, or if the anti-drop device fails. Furthermore, due to manufacturing defects in the hook steel or cracks caused by fatigue, the hook can break under excessive loads or during emergency braking, resulting in hook failure accidents. 4. Broken rope: Refers to an accident in which a lifting rope or a rope used for hoisting breaks, resulting in the loss of the load. Overloading during lifting, malfunctioning lift limit switches, lifting at an angle, and continuing to use steel ropes that have exceeded their specified service life are the main causes of rope breakage. 5. Basic accidents: Limited space leads to insufficient bearing capacity around the tower crane foundation, or accidents such as tilting or overturning of the tower crane occur because its foundation is positioned on the slope of the building’s foundation. 6. Electric shock The causes of electric shock are, first, leakage from the motor itself, and second, the crane’s structure coming into contact with exposed high-voltage power lines due to working at a great distance from them, which results in employees being shocked by electricity. 1. Toppling: This occurs due to soft or uneven foundations for the tower crane, or the failure of safety devices such as load limiters or torque limiters, which can cause the entire tower structure to topple over, or result in the crane’s boom, counterweight arm, and tower cap falling to the ground. Additionally, the crane can still be used as normal even when its legs have not been fully extended, and improper operation during the installation and dismantling of the tower crane can also easily lead to tipping accidents. 2. Broken arm Accidents involving a broken arm can be caused by excessive lifting torque, failure of the boom limit mechanism leading to over-retraction, or the collapse of the crane. Furthermore, such accidents can also easily occur when there are issues with manufacturing quality, due to a lack of maintenance over time, cracks appearing in the arm sections, overload, or vibrations caused by emergency braking. 3. Hook detachment or breakage: Refers to accidents in which heavy objects disappear as a result of them coming loose from the hook opening using heavy lifting equipment or specialized lifting tools. The load may fall off if the hook lacks an anti-drop device, if the hook mouth is deformed, or if the anti-drop device fails. Furthermore, due to manufacturing defects in the hook steel or cracks caused by fatigue, the hook can break under excessive loads or during emergency braking, resulting in hook failure accidents. 4. Broken rope: Refers to an accident in which a lifting rope or a rope used for hoisting breaks, resulting in the loss of the load. Overloading during lifting, malfunctioning lift limit switches, lifting at an angle, and continuing to use steel ropes that have exceeded their specified service life are the main causes of rope breakage. 5. Basic accidents: Limited space leads to insufficient bearing capacity around the tower crane foundation, or accidents such as tilting or overturning of the tower crane occur because its foundation is positioned on the slope of the building’s foundation. 6. Electric shock The causes of electric shock are, first, leakage from the motor itself, and second, the crane’s structure coming into contact with exposed high-voltage power lines due to working at a great distance from them, which results in employees being shocked by electricity.